Disclosed are hydrogels polymerized with or around a solid biofunctional moiety, biodegradable or permanent, designed to be implantable in a mammalian body, intended to block or mitigate the formation of tissue adhesions, and intended to aid in functional healing. The hydrogels of the present invention are characterized by comprising multiphasic structural elements: a) at least one gel phase, b) at least one solid phase, c) optional polymeric chains connecting gel and solid phases, d) optional shape designs that provide for an interpenetrating geometry between gels and solids, e) optional shape designs that enhance a tissue-hydrogel interface, and f) optional shape designs that provide a biofunctional aspect. The hydrophobicity of the various phases is chosen to reduce tissue adhesion and enhance tissue healing. The morphology of the polymers comprising the gel phase is typically of high molecular weight and has morphology that encourages entanglement. Useful polymeric structures include branching chains, comb or brush, and dendritic morphologies.

A thermoplastic starch (TPS)/polylactic acid (PLA)/poly(butylene adipate-co -terephthalate) (PBAT) blend modified biodegradable resin is prepared by using a chain extender, and is prepared from the following raw materials: 20-30 parts by weight of TPS; 20-30 parts by weight of PLA; 40-60 parts by weight of PBAT; and 0.5-0.9 parts by weight of a chain extender KL-E. The preparation method is a two-step method: blending the TPS with the PBAT in a twin screw for granulating; mixing TPS/PBAT mixed granules with PLA granules, and dissolving the chain extender KL-E into an ethyl acetate solution. The chain extender KL-E can be uniformly distributed in PLA and TPS/PBAT mixed granules by using a spraying method, and the remaining short-chain molecules and terminal carboxyl molecules in the mixed granules can be changed into long-chain molecules.

Disclosed herein are a biodegradable polymer microparticle for a filler comprising a core and a shell, wherein the core contains secondary particles including aggregates of a plurality of primary particles, the shell has a raspberry shaped structure, an average particle diameter (D.sub.50) of the biodegradable polymer microparticle ranges from 20 to 200 μm, a manufacturing method thereof, a freeze-dried body including the same, and filler injection including the same.

Biodegradable drinking straws and methods of making biodegradable drinking straws. The drinking straws are thin and functional, having a tactile feel similar to conventional drinking straws, and are biodegradable in 12 months or less. The drinking straws use less material while maintaining high thickness uniformity, reducing cost and increasing structural integrity.

Provided is a biopolymer composite film that includes a polysaccharide matrix reinforced with soft dendritic colloids and methods for making. The method can include dissolving agarose in water to form a first mixture, mixing nanofibrillated chitosan in the agarose, sonicating or stirring the mixture to form a homogeneous second mixture, casting the second mixture, and gelling the second mixture to form a film. Also provided is a food or consumer product packaging film that includes the biopolymer composite film.

A biodegradable core-shell microcapsule composition with controlled release of an active material is provided, wherein the shell of the microcapsule is composed of a biopolymer cross-linked with a combination of two or more different types of cross-linking agents.

A zipper tape is in an elongated shape and includes, in a cross-sectional shape, a pair of base strips and engagement portions projecting from surfaces facing each other of the pair of respective base strips, the engagement portions being engageable with each other. At least the engagement portions are each formed of a first biodegradable resin composition having a yield strain of 3.4% or more during a tensile test.

This cellulose acetate has a total degree of acetyl substitution of 1.75 or more and 2.55 or less, and a degree of acetyl substitution at 2-position or a degree of acetyl substitution at 3-position is 0.7 or less. This cellulose acetate composition includes the cellulose acetate and an additive. The additive is one or more selected from the group consisting of (a) substances of which a pH of a 1 wt. % aqueous solution at 20° C. is 8 or more, (b) substances that dissolve in water at 20° C. in an amount of 2 wt. % or more, and (c) substances that exhibit biodegradability in seawater.

A biodegradable resin particle, includes: a base particle containing a biodegradable resin; a first layer on a surface of the base particle, the first layer containing at least one cationic resin of a polyalkyleneimine, a polyallylamine and a polyvinylamine; and a second layer on the first layer, the second layer containing an anionic or nonionic hydrophobic compound.

A solid crosslinked polyester composition is disclosed wherein the crosslinked polyester is environmentally degradable in less than about 180 days. The crosslinked polyester is the polyesterification reaction product between one or more multi-hydroxylic alcohols, one or more hydroxy acids, and one or more multi-carboxylic acid compounds. Alternately, the crosslinked polyester is the polyesterification reaction product between one or more multi-hydroxylic alcohols, one or more hydroxy acids, one or more multi-carboxylic acid compounds, and a cyclic ester.